^ yes that is true.
"For street-focused builds, dexos GM-approved Mobil 1 5W-30 or Mobil 1 15W-50 are especially suited for high- and low-temperature protection, while dexos2 GM-approved Mobil 1 ESP Formula 0W-40 also will be available, the first motor oil specifically developed for Corvette LT1 and LT4 engines.
For track-focused applications, Mobil 1 Racing 0W-30 and Mobil 1 Racing 0W-50 feature twice the amount of zinc compared to regular street oils and were specifically designed for highly-loaded flat-tappet engine applications."